Alunite and Amazonite Physical Properties

Alunite

Amazonite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.92.55-2.57

1 7.18

1.5 Fracture

Conchoidal, Uneven

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

On {0001}, perfect

2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal

1.7 Mohs Hardness

3.5-46-6.5

2 10

1.8 Chemical Composition

KAl3(SO4)2(OH)6

KAlSi₃O₈

Alunite and Amazonite Chemical Formula

While comparing Alunite and Amazonite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Alunite and Amazonite chemical formula.

Chemical formula of Alunite- KAl3(SO4)2(OH)6
Chemical formula of Amazonite- KAlSi₃O₈

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Alunite and Amazonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Amazonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Amazonite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.55-2.57 whereas that of Amazonite is 2.55-2.57.